Significant Figures
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is an example of a number when non-zero digits are always significant? How many significant figures does it have? | show 🗑
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| How many significant digits does 7003 have? Why? | show 🗑
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| Why would 0.0071 only have two significant digits? | show 🗑
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| show | 43.00 - four significant figures
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| How many significant digits does 9800 have? | show 🗑
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| show | If zeroes are measured, they are significant by using the scientific notation.
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| show | Counted values (i.e 34 students in a class) are considered to be infinitely precise, so they have an infinite number of SD. (1.e. 34 students can also be considered as 34.00000000 students)
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| show | Coefficients in a formula are infinitely precise, so they have an infinite number of SD's.
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| show | A conversion factor could be anything like 1kg/1000g or 100cm/m. It is infinitely precise.
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| show | Since 56.4 has three SD's, then our final number must have 3 significant digits.
2489.2 x 56.4 = 140390.88 (140 000 - 3SD...counted zeroes= 1.40×10>5 final answer
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| How many SD's does 5002 have? why? | show 🗑
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| How many SD's does 50.002 have? why? | show 🗑
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| 500 | show 🗑
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| When would 500 have two or three Significant Figures? Why? | show 🗑
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| How many significant figures would 500.0 have? Why? | show 🗑
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| Round 0.001775 to two Significant figures. | show 🗑
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| Round 8792 to two Significant Figures. | show 🗑
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| show | The answer can only have as many decimal places. Since 2.1 has the least amount of decimal places, the final answer must be rounded to 1/10 of a decimal place.
3.76+14.83+2.1=20.67 (only need 1 decimal place...rules of rounding makes 20.67=20.7)
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| What is 22.37 x 3.10 x 85.75? Why? | show 🗑
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| show | 0.0005= 5x10>-4
Therefore, only the is significant so there is only 1SF
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| What is (3.45x10>7)(6.25x10>5)? Why? | show 🗑
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| show | 1. Divide coefficients and subtract exponents (0.530303 x 10>4)
2. Change to correct sci.not and round to correct S.D (5.3 x 10>3)
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| What is (3.76 x 10>4)+(5.5 x 10>2)? why? | show 🗑
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| show | Accuracy of a value is how close the measured or experimental value is to the actual/true.predicted value
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| show | % error compares measured and actual values.
%error=((measured value-actual value)/(actual value))∙100
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| What is the experimental error and hos is it calculated? | show 🗑
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| show | %error= -13% (underestimated measured value by 13%)
exp.error= -8g (underestimated exp. value by 8g)
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| show | The actual value
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| show | a) -9.7% error
b) -15lbs
Therefore the measured value is too low, or too underestimated.
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| show | a) 6.4%
b)10lbs
(The greater the errors the less accurate a measurement is!)
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| What is precision? | show 🗑
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| What is the difference between accuracy and precision? | show 🗑
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| What would be a more precise way of saying 16 years old? | show 🗑
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| Write the number of SD's for: 24.7kg | show 🗑
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| show | 4
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| Write the number of SD's for: 247.701mg | show 🗑
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| show | 5
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| Write the number of SD's for: 8.930 x 10>5 km | show 🗑
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| Write the number of SD's for: 2.5 g | show 🗑
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| show | 1
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| show | 4
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| How many SF would 2400g have if you had measured the quantity? | show 🗑
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| show | 2SD
This is because zeroes after a non-zero number are insignificant, they only act as placeholders
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| Perform the calculation and express the answer in the correct number of sig.figs. 55.671g + 45.78g | show 🗑
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| show | 2.5mm
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| show | 1.70L
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| show | 3.07ml
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| show | 35.2g>2
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| show | 0.04kg/L
OR
4 x 10>-2
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| Perform the calculation and express the answer in the correct number of sig.figs. 17.51g/2.2cm>3 | show 🗑
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| show | 4
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| Write the number of sig.figs for: 308 | show 🗑
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| show | 3
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| show | 97.88g
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| Perform the calculation and express the answer in the correct number of sig.figs. 32.34km x 93.1km | show 🗑
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| Perform the calculation and express the answer in the correct number of sig.figs. 66.0ml x 0.031ml | show 🗑
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| Perform the calculation and express the answer in the correct number of sig.figs. 1.12g/92ml | show 🗑
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| show | 4.0m>2
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| Perform the calculation and express the answer in the correct number of sig.figs. 1.0m/0.3m | show 🗑
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| Perform the calculation and express the answer in the correct number of sig.figs. 1.0000/0.30000 | show 🗑
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| Perform the calculation and express the answer in the correct number of sig.figs. 1/3.00000000 | show 🗑
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| Perform the calculation and express the answer in the correct number of sig.figs. 1.000000000/3 | show 🗑
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| show | 3 x 10>-6
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| What us a micrometer? | show 🗑
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| show | (8 x 10>26)m
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| show | 4 x 10>7
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| Perform the calculation: 357.89 - 0.002 | show 🗑
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| Perform the calculation: 84.675 - 3 | show 🗑
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| Is 500m/hr a conversion factor? | show 🗑
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Created by:
superchickgirl5
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